Precision measurements on Si-
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866909163937857536 |
|---|---|
| author | Karls, J. Cederquist, H. Gibson, N. D. Grumer, J. Ji, M. Kardasch, I. Leimbach, D. Martini, P. Navarrete, J. E. Navarro Poulose, R. Rosen, S. Schmidt, H. T. Simonsson, A. Zettergren, H. Hanstorp, D. |
| author_facet | Karls, J. Cederquist, H. Gibson, N. D. Grumer, J. Ji, M. Kardasch, I. Leimbach, D. Martini, P. Navarrete, J. E. Navarro Poulose, R. Rosen, S. Schmidt, H. T. Simonsson, A. Zettergren, H. Hanstorp, D. |
| contents | High-precision measurements of the electron affinities (EA) of the three stable isotopes of silicon, $^{28}$Si, $^{29}$Si and $^{30}$Si, have been performed at the cryogenic electrostatic ion-beam storage ring DESIREE. The quantum states of the ions were manipulated using laser depletion, and the ions were photodetached by laser photodetachment threshold spectroscopy. These EA values are the first reported for $^{29}$Si$^-$ and $^{30}$Si$^-$ and provide a reduced uncertainty for $^{28}$Si$^-$. The resulting EAs are $EA(^{28}$Si$) = 1.38952201(17)$ eV, $EA(^{29}$Si$) = 1.38952172(12)$ eV and $EA(^{29}$Si$) = 1.38952078(12)$ eV, with the corresponding isotope shifts $IS(^{29-28}$Si$) = 0.29(16)$ micro eV and $IS(^{30-28}$Si$) = 1.23(16) $ micro eV. In addition to these measurements, the resolution and signal-to-background level was sufficient to reveal the hyperfine structure splitting in the $^{29}$Si$^-$ isotope, which we report to be $1.8(4) micro eV. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_06226 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Precision measurements on Si- Karls, J. Cederquist, H. Gibson, N. D. Grumer, J. Ji, M. Kardasch, I. Leimbach, D. Martini, P. Navarrete, J. E. Navarro Poulose, R. Rosen, S. Schmidt, H. T. Simonsson, A. Zettergren, H. Hanstorp, D. Atomic Physics High-precision measurements of the electron affinities (EA) of the three stable isotopes of silicon, $^{28}$Si, $^{29}$Si and $^{30}$Si, have been performed at the cryogenic electrostatic ion-beam storage ring DESIREE. The quantum states of the ions were manipulated using laser depletion, and the ions were photodetached by laser photodetachment threshold spectroscopy. These EA values are the first reported for $^{29}$Si$^-$ and $^{30}$Si$^-$ and provide a reduced uncertainty for $^{28}$Si$^-$. The resulting EAs are $EA(^{28}$Si$) = 1.38952201(17)$ eV, $EA(^{29}$Si$) = 1.38952172(12)$ eV and $EA(^{29}$Si$) = 1.38952078(12)$ eV, with the corresponding isotope shifts $IS(^{29-28}$Si$) = 0.29(16)$ micro eV and $IS(^{30-28}$Si$) = 1.23(16) $ micro eV. In addition to these measurements, the resolution and signal-to-background level was sufficient to reveal the hyperfine structure splitting in the $^{29}$Si$^-$ isotope, which we report to be $1.8(4) micro eV. |
| title | Precision measurements on Si- |
| topic | Atomic Physics |
| url | https://arxiv.org/abs/2404.06226 |